One doesn't need data to know that things are wrong. Sometimes, examining one's own site is proof enough.
Maybe it looks like an old business website. Maybe the colors feel off. Maybe the layout looks crowded. Maybe it just doesn’t feel like something you’d trust today.
That’s not a small issue. People form opinions in seconds. When a website appears outdated, visitors will leave the site before they complete their exploration of available content. This is even more important in website design for small businesses, where trust is everything.
You don’t get multiple chances. You get one quick impression, and that’s it.